MAINT: Explicitly size wavelet coeff arrays
MAINT: Explicitly size wavelet coeff arrays

Prevent accidental errors from creeping in later.

grlee77/pywt,PyWavelets/pywt,eriol/pywt,kwohlfahrt/pywt,kwohlfahrt/pywt,rgommers/pywt,eriol/pywt,kwohlfahrt/pywt,PyWavelets/pywt,rgommers/pywt,michelp/pywt,michelp/pywt,michelp/pywt,grlee77/pywt,rgommers/pywt,eriol/pywt,rgommers/pywt